On Nature of Things

De rerum natura (On the Nature of Things) is a 1st-century BC didactic poem by the Roman poet and philosopher Lucretius with the goal of explaining Epicurean philosophy to a Roman audience.


This elegant manuscript of Lucretius‘s philosophical poem, copied by an Augustinian friar for a pope, is an example of the interest in ancient accounts of nature taken by the Renaissance curia. The work, written in the first century B.C., contains one of the principal accounts of ancient atomism. The poem was little known in the Middle Ages and its author dismissed as an atheist and lunatic, but after the discovery of an early manuscript in 1417 by the humanist and papal secretary Poggio Bracciolini, it circulated widely in Italy. This is one of numerous copies made at that time. The coat of arms of Sixtus IV appears on this page.

The poem opens with an invocation to Venus, whom Lucretius addresses as an allegorical representation of the reproductive power, after which the business of the piece commences by an enunciation of the proposition on the nature and being of the gods, which leads to an invective against the gigantic monster superstition, and a thrilling picture of the horrors which attends its tyrannous sway. In it Lucretius prays to Venus, not only as the universal life force but also as ancestress of the Romans, begging her to intervene with her lover Mars and save the troubled Roman republic from civil strife. Although this choice of motif may owe much to Lucretius’ forerunner and model Empedocles, for whom Love or Aphrodite is the great creative force in the cosmos, it borders perilously on a betrayal of the poem’s central motif, that we should not fear the gods because they do not, and never would, intervene in our world.

Then follows a lengthened elucidation of the axiom that nothing can be produced from nothing, and that nothing can be reduced to nothing (Nil fieri ex nihilo, in nihilum nil posse reverti); which is succeeded by a definition of the Ultimate Atoms, infinite in number, which, together with Void Space (Inane), infinite in extent, constitute the universe. The shape of these corpuscles, their properties, their movements, the laws under which they enter into combination and assume forms and qualities appreciable by the senses, with other preliminary matters on their nature and affections, together with a refutation of objections and opposing hypotheses, occupy the first two books.

Lucretius was both admired and imitated by writers of the early Roman empire, and in the eyes of Latin patristic authors like Lactantius he came to serve as the leading spokesman of the godless Epicurean philosophy. His poem subsequently survived in two outstanding 9th-century manuscripts (known as O and Q), which following the poem’s rediscovery by the papal secretary Poggio Bracciolini in 1417 (for this fascinating story see Greenblatt 2011) became the basis of the Renaissance editions. It was through Lucretius, along with the Latin translation of Diogenes LaertiusLife of Epicurus, that Epicurean ideas entered the main philosophical (especially ethical) debates of the age. However, despite his extensive impact in literary and philosophical circles—he is, for example, among the writers most assiduously cited by Montaigne—Lucretius struggled for two centuries to shake off the pejorative label of ‘atheist’. He became a key influence on the emergence of early modern atomism in the 17th century—a development above all due to Pierre Gassendi’s construction of an atomistic system which, while founded on Epicurus and Lucretius, had been so modified as to be acceptable to Christian ideology. Lucretius’ many admirers in the early modern era included Thomas Jefferson, a self-declared Epicurean who owned numerous editions of the poem.

The Lush Growth of Spring

800px-Botticelli-primaveraPrimavera (also known as Allegory of Spring), Sandro Botticelli, c. 1482


Most critics agree that the painting, depicting a group of mythological figures in a garden, is allegorical for the lush growth of Spring. Other meanings have also been explored. Among them, the work is sometimes cited as illustrating the ideal of Neoplatonic love. The painting itself carries no title and was first called La Primavera by the art historian Giorgio Vasari who saw it at Villa Castello, just outside Florence, in 1550.

The history of the painting is not certainly known, though it seems to have been commissioned by one of the Medici family. The painting overall was inspired by a description the Roman poet Ovid wrote of the arrival of Spring (Fasti, Book 5, May 2), though the specifics may have been derived from a poem by Angelo Poliziano. As Poliziano’s poem, “Rusticus”, was published in 1483 and the painting is generally held to have been completed around 1482, some scholars have argued that the influence was reversed.

Another inspiration for the painting seems to have been the Lucretius poem De rerum natura (On the Nature of Things), which includes the lines, “Spring-time and Venus come, and Venus’ boy, / The winged harbinger, steps on before, / And hard on Zephyr’s foot-prints Mother Flora, / Sprinkling the ways before them, filleth all / With colors and with odors excellent.”

Various interpretations of the figures have been set forth, but it is generally agreed that at least at one level the painting is, as characterized by Cunningham and Reich (2009), “an elaborate mythological allegory of the burgeoning fertility of the world.” Elena Capretti in Botticelli (2002) suggests that the typical interpretation is thus:

The reading of the picture is from right to left: Zephyrus, the biting wind of March, kidnaps and possesses the nymph Chloris, whom he later marries and transforms into a deity; she becomes the goddess of Spring, eternal bearer of life, and is scattering roses on the ground.

This is a tale from the fifth book of Ovid’s Fasti in which the wood nymph Chloris’s naked charms attracted the first wind of Spring, Zephyr. Zephyr pursued her and as she was ravished, flowers sprang from her mouth and she became transformed into Flora, goddess of flowers. In Ovid’s work the reader is told ’till then the earth had been but of one colour’. From Chloris’ name the colour may be guessed to have been green – the Greek word for green is khloros, the root of words like chlorophyll – and may be why Botticeli painted Zephyr in shades of bluish-green.

In addition to its overt meaning, the painting has been interpreted as an illustration of the ideal of Neoplatonic love popularized among the Medicis and their followers by Marsilio Ficino. The Neoplatonic philosophers saw Venus as ruling over both earthly and divine love and argued that she was the classical equivalent of the Virgin Mary; this is alluded to by the way she is framed in an altar-like setting that is similar to contemporary images of the Virgin Mary.


Botticelli’s Pallas and the Centaur (1482) has been proposed as the companion piece to Primavera


In this interpretation, as set out in Sandro Botticelli, 1444/45-1510 (2000), the earthy carnal love represented by Zephyrus to the right is renounced by the central figure of the Graces, who has turned her back to the scene, unconcerned by the threat represented to her by Cupid. Her focus is on Mercury, who himself gazes beyond the canvas at what Deimling asserts hung as the companion piece to Primavera: Pallas and the Centaur, in which “love oriented towards knowledge” (embodied by Pallas Athena) proves triumphant over lust (symbolized by the centaur).

It is, on the other hand, possible that, rather than her having renounced carnal love, the intense emotional expression with which she gazes at Mercury is one of dawning love, proleptic of the receipt of Cupid’s arrow which appears to be aimed particularly at her; which emotion is being recognised with an expression both quizzical and apprehensive by the sister immediately to her left.

The origin of the painting is somewhat unclear. It may have been created in response to a request in 1477 of Lorenzo de’ Medici, or it may have been commissioned somewhat later by Lorenzo or his cousin Lorenzo di Pierfrancesco de’ Medici. One theory suggests Lorenzo commissioned the portrait to celebrate the birth of his nephew Giulio di Giuliano de’ Medici (who would one day become Pope), but changed his mind after the assassination of Giulo’s father, his brother Giuliano, having it instead completed as a wedding gift for Lorenzo di Pierfrancesco de’ Medici, who married in 1482.